Li-exchanged low silica EMT-containing metallosilicates
US5567407A · kind A · utility
Inventors
Key dates
| Filing date | May 12, 1994 |
| Grant date | Oct 22, 1996 |
| Priority date | — |
| Expiry date | May 12, 2014 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S423/21
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
The present invention is a composition, a synthesis of the composition and a method of using the composition for selectively adsorptively separating nitrogen from oxygen wherein the composition is a crystalline EMT with a Si/Al ratio less than 2.0 and a lithium cation exchange of at least 80%, preferably including an intergrowth with a crystalline FAU structure, wherein the pure or intergrowth compositions have the chemical formula: EQU (0.20-0.0)M.sub.2/n O:(0.80-1.0)Li.sub.2 O:X.sub.2 O.sub.3 :(2.0 to <4.0)SiO.sub.2 wherein M=a metal cation other than lithium having a valence of n, and X is selected from the group consisting of aluminum, gallium and boron, preferably aluminum.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.